File x86-haswell-string-flags.patch of Package glibc.14271
2018-10-23 Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #23709]
* sysdeps/x86/cpu-features.c (init_cpu_features): Set TSX bits
independently of other flags.
2017-12-18 Joseph Myers <joseph@codesourcery.com>
* nptl/tst-attr3.c: Include <libc-diag.h>.
Index: glibc-2.26/sysdeps/x86/cpu-features.c
===================================================================
--- glibc-2.26.orig/sysdeps/x86/cpu-features.c
+++ glibc-2.26/sysdeps/x86/cpu-features.c
@@ -281,7 +281,13 @@ init_cpu_features (struct cpu_features *
| bit_arch_Fast_Unaligned_Copy
| bit_arch_Prefer_PMINUB_for_stringop);
break;
+ }
+ /* Disable TSX on some Haswell processors to avoid TSX on kernels that
+ weren't updated with the latest microcode package (which disables
+ broken feature by default). */
+ switch (model)
+ {
case 0x3f:
/* Xeon E7 v3 with stepping >= 4 has working TSX. */
if (stepping >= 4)